Which condition is a biotic factor of an aquarium ecosystem?
o amount of oxygen in the water
temperature of the water
o
algae growing on the glass
o
gravel on the bottom of the aquarium

Algae growing on the glass

Explanation:

biotic means it's alive, while abiotic means it's not alive

The answer is the algae one!

Explanation:

I took the K-12 test and got 100%!

answer; polycythemia is the correct answer;